集合-TreeSet-Comparator

package com.bjpowernode.tree2;

public class Student {
    
    private String name;
    private int age;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public Student(String name, int age) {
        super();
        this.name = name;
        this.age = age;
    }
    @Override
    public String toString() {
        return "Student [name=" + name + ", age=" + age + "]";
    }
    
}

package com.bjpowernode.tree2;

import java.util.Comparator;

public class StudentComparator implements Comparator<Student> {

    @Override
    public int compare(Student stu1, Student stu2) {
        
        if (stu1.getAge()==stu2.getAge()) {
            return stu1.getName().compareTo(stu2.getName());
        }
        return stu1.getAge()-stu2.getAge();
    }

}

package com.bjpowernode.tree2;

import java.util.Set;
import java.util.TreeSet;

public class TreeSet1 {

    public static void main(String[] args) {
        
        StudentComparator studentComparator=new StudentComparator();
        Set<Student> set=new TreeSet<>(studentComparator);
        Student stu1=new Student("张三", 66);
        Student stu2=new Student("lisi", 23);
        Student stu3=new Student("刘能", 45);
        Student stu4=new Student("赵本山", 62);
        Student stu5=new Student("赵本山", 62);
        Student stu6=new Student("abc", 45);
        set.add(stu1);
        set.add(stu2);
        set.add(stu3);
        set.add(stu4);
        set.add(stu5);
        set.add(stu6);
//        for (Student student : set) {
//            System.out.println(student);
//        }
        System.out.println("姓名\t年龄");
//        System.out.println("姓名"+"\t"+"年龄");
        for (Student student : set) {
            System.out.println(student.getName()+"\t"+student.getAge());
        }
    }

}